19848 Yeungchuchiu

19848 Yeungchuchiu

Light-curve based 3D-model of 19848 Yeungchuchiu
Discovery [1]
Discovered by W. K. Yeung
Discovery site Desert Beaver Obs.
Discovery date 2 October 2000
Designations
MPC designation 19848 Yeungchuchiu
Named after
 Chu Chiu Yeung
(discoverer's father)[2]
2000 TR · 1998 KR38
1999 SY6
main-belt · Eos [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 33.42 yr (12,206 days)
Aphelion 3.2395 AU
Perihelion 2.7764 AU
3.0080 AU
Eccentricity 0.0769
5.22 yr (1,906 days)
340.81°
Inclination 11.060°
54.759°
350.23°
Physical characteristics
Dimensions 13.242±0.282 km[4]
11.69±0.55 km[5]
12.90 km (calculated)[3]
3.450±0.002 h[6]
3.4508±0.0003 h[7]
0.2107±0.0250[4]
0.170±0.020[5]
0.14 (assumed)[3]
S [3]
12.2[1][3][5]
11.7[4]
12.227[7]

    19848 Yeungchuchiu, provisional designation 2000 TR, is a stony asteroid from the outer region of the asteroid belt, about 13 kilometers in diameter. It was discovered by Canadian amateur astronomer William Yeung at the U.S. Desert Beaver Observatory in Arizona, on 2 October 2000. It is the largest minor planet found by the discoverer, just 1°.2 west of Jupiter.[8]

    The S-type asteroid is a member of the Eos family, an orbital group of more than 4,000 asteroids, which are well known for mostly being of stony composition. It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,906 days). Its orbit shows an eccentricity of 0.08 and an inclination of 11 degrees from the plane of the ecliptic.[1]

    In 2005, a photometric light-curve analysis by the discoverer at the Desert Eagle Observatory in Arizona, rendered a well-defined rotation period of 3.450±0.002 hours with a brightness variation of 0.70 in magnitude (U=3),[6] while an observation at the Palomar Transient Factory in 2013 gave a period of 3.4508±0.0003 hours with an amplitude of 0.63 mag (U=2).[7] The large amplitude suggests that the body is of non-spherical shape and that the long axis is almost twice as long as the short axis. It is likely that the rotational axis was almost perpendicular to the observation's line-of-sight.[6]

    According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 11.7 and 13.2 kilometers in diameter with an albedo for its surface of 0.17 and 0.21, respectively.[4][5] The Collaborative Asteroid Lightcurve Link (CALL) also assumes an albedo of 0.21 and calculates a diameter of 12.9 kilometers for the stony asteroid.[3]

    The minor planet was named by the discoverer after his father, Chu Chiu Yeung (b. 1925), in gratitude for his unconditional support.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 19848 Yeungchuchiu (2000 TR)" (2015-12-09 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (19848) Yeungchuchiu. Springer Berlin Heidelberg. p. 859. ISBN 978-3-540-00238-3. Retrieved January 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (19848) Yeungchuchiu". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
    4. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved January 2016.
    5. 1 2 3 4 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved January 2016.
    6. 1 2 3 Yeung, Kwong W. (September 2006). "Lightcurve analysis for 19848 Yeungchuchiu". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 33 (3): 49. Bibcode:2006MPBu...33...49Y. ISSN 1052-8091. Retrieved January 2016.
    7. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved January 2016.
    8. ↑ "19848 Yeungchuchiu (2000 TR)". Minor Planet Center. Retrieved January 2016.

    External links


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